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Digital Angle Gauge

Front
Front

Here’s a useful tool for the kit, a digital angle gauge/protractor. These use a silicon sensor to show the number of degrees the unit is out of level.

Magnets!
Magnets!

Magnets are provided in the base, so the tool can attach to any ferrous surface.

Battery Box
Battery Box

Power is provided by a single AAA cell.

Main PCB
Main PCB

Removing the rear cover reveals the brains of the unit, and there’s not much to it at all. The main microcontroller is a CoB-type device, so no part numbers available from that one.

Sensing Element
Sensing Element

The IC to the left of the main microcontroller is the sensing element. There’s no markings on this inclinometer IC so I’m not sure of the specs, but it will be a 3D-MEMS device of some sort.

Power Supply
Power Supply

The other side of the PCB has the power supply for the logic, and a serial EEPROM, probably storing calibration data.

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Eberspacher Controller & Remote

7-Day Programmer
7-Day Programmer

The Eberspacher heaters can be controlled with a single switch, but it’s more convenient to have some temperature control & the option of a timer. Above is an ex-BT 701 series controller, with built in 7-day programmer. Being an ex-BT van version though, it’ll only switch the heater on for 1 hour at a time.
To get around this slight niggle, I fitted a bypass toggle switch.

Remote Control
Remote Control

For a bit of extra convenience, I got an RF remote controlled relay module from eBay (£5).
This allows me to switch things on remotely, so I can return to a nice toasty tent while camping.
There is an official RF remote for Eberspacher heaters, but I’ve no doubt they’re hideously expensive.

RF Receiver
RF Receiver

Here’s the receiver PCB, there’s an EEPROM & a microcontroller onboard for handling the codes the remotes send, but as the number has been scrubbed off the micro, no data there. This uses a standard RF receiver module.

RF Remote
RF Remote

Here’s the remote itself, this uses a 12v battery instead of a 3v lithium cell. A little of a pain since these batteries can be a bit pricey.
As this RF system operates on 315MHz, it’s technically illegal in the UK, but I was unable to find a 433MHz version with the features required. Nevermind ;).

Controller Internals
Controller Internals

Here’s the module installed in the controller casing. I have since run the antenna wire around the edge of the case to try & get the furthest range on receive. The relay contacts are just paralleled across the bypass switch, so when the relay energizes the heater fires up.
Luckily the thermostatic control portion of the 701 programmer is operational even when heating mode is not active.

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Alpha Networks WMP-N06SA MiniPCI Wireless N Card

Here’s a quick look at one of the now surplus cards from my old networking system, a MiniPCI Wireless interface card.

Card Overview
Card Overview

This is an older generation card, one of the first with Wireless N support on 2.4GHz.

PCI Chipset
PCI Chipset

Network PHY & firmware EEPROM. Power supply stuff is over to the left.

RF Transceiver
RF Transceiver

Inside the shield is the RF Transceiver IC & it’s associated RF power amplifier ICs for each antenna. These power amplifiers are LX5511 types from Microsemi, with a maximum power output of +26dBm.